preliminary support for save/restore.
Although Save/restore isn't fully working yet, this patch is necessary
to compile.
Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
---
arch/ia64/xen/Makefile | 2 +-
arch/ia64/xen/{time.h => suspend.c} | 40 +++++++++++++++++++++++++++++++++-
arch/ia64/xen/time.c | 33 ++++++++++++++++++++++++++++
arch/ia64/xen/time.h | 1 +
4 files changed, 73 insertions(+), 3 deletions(-)
copy arch/ia64/xen/{time.h => suspend.c} (66%)
diff --git a/arch/ia64/xen/Makefile b/arch/ia64/xen/Makefile
index 972d085..0ad0224 100644
--- a/arch/ia64/xen/Makefile
+++ b/arch/ia64/xen/Makefile
@@ -3,7 +3,7 @@
#
obj-y := hypercall.o xenivt.o xensetup.o xen_pv_ops.o irq_xen.o \
- hypervisor.o xencomm.o xcom_hcall.o grant-table.o time.o
+ hypervisor.o xencomm.o xcom_hcall.o grant-table.o time.o suspend.o
obj-$(CONFIG_IA64_GENERIC) += machvec.o
diff --git a/arch/ia64/xen/time.h b/arch/ia64/xen/suspend.c
similarity index 66%
copy from arch/ia64/xen/time.h
copy to arch/ia64/xen/suspend.c
index b9c7ec5..b4ce6b6 100644
--- a/arch/ia64/xen/time.h
+++ b/arch/ia64/xen/suspend.c
@@ -1,5 +1,5 @@
/******************************************************************************
- * arch/ia64/xen/time.h
+ * arch/ia64/xen/suspend.c
*
* Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
* VA Linux Systems Japan K.K.
@@ -18,6 +18,42 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
+ * suspend/resume
*/
-extern struct pv_time_ops xen_time_ops __initdata;
+#include <xen/xen-ops.h>
+#include <asm/xen/hypervisor.h>
+#include "time.h"
+
+void
+xen_mm_pin_all(void)
+{
+ /* nothing */
+}
+
+void
+xen_mm_unpin_all(void)
+{
+ /* nothing */
+}
+
+void
+xen_pre_suspend()
+{
+ /* nothing */
+}
+
+void
+xen_post_suspend(int suspend_cancelled)
+{
+ if (suspend_cancelled)
+ return;
+
+ xen_ia64_enable_opt_feature();
+ /* add more if necessary */
+}
+
+void xen_arch_resume(void)
+{
+ xen_timer_resume_on_aps();
+}
diff --git a/arch/ia64/xen/time.c b/arch/ia64/xen/time.c
index 3414f1e..81a61e8 100644
--- a/arch/ia64/xen/time.c
+++ b/arch/ia64/xen/time.c
@@ -26,6 +26,8 @@
#include <linux/irq.h>
#include <linux/clocksource.h>
+#include <asm/timex.h>
+
#include <asm/xen/hypervisor.h>
#include <xen/interface/vcpu.h>
@@ -163,3 +165,34 @@ struct pv_time_ops xen_time_ops __initdata = {
.do_steal_accounting = xen_do_steal_accounting,
.clocksource_resume = xen_itc_jitter_data_reset,
};
+
+/* Called after suspend, to resume time. */
+static void xen_local_tick_resume(void)
+{
+ /* Just trigger a tick. */
+ ia64_cpu_local_tick();
+ touch_softlockup_watchdog();
+}
+
+void
+xen_timer_resume(void)
+{
+ unsigned int cpu;
+
+ xen_local_tick_resume();
+
+ for_each_online_cpu(cpu)
+ xen_init_missing_ticks_accounting(cpu);
+}
+
+static void ia64_cpu_local_tick_fn(void *unused)
+{
+ xen_local_tick_resume();
+ xen_init_missing_ticks_accounting(smp_processor_id());
+}
+
+void
+xen_timer_resume_on_aps(void)
+{
+ smp_call_function(&ia64_cpu_local_tick_fn, NULL, 0, 1);
+}
diff --git a/arch/ia64/xen/time.h b/arch/ia64/xen/time.h
index b9c7ec5..f98d7e1 100644
--- a/arch/ia64/xen/time.h
+++ b/arch/ia64/xen/time.h
@@ -21,3 +21,4 @@
*/
extern struct pv_time_ops xen_time_ops __initdata;
+void xen_timer_resume_on_aps(void);
--
1.5.3
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